MAX15020 Datasheet, PDF (3/19 Pages) Maxim Integrated Products – 2A, 40V Step-Down DC-DC Converter with Dynamic Output-Voltage Programming

2A, 40V Step-Down DC-DC Converter with
Dynamic Output-Voltage Programming
ELECTRICAL CHARACTERISTICS (continued)
(V_IN = 36V, V_REG = V_DVREG, V_PGND = V_GND = V_EP = 0V, V_SYNC = 0V, C_REFOUT = 0.1µF, T_A = T_J = -40°C to +125°C, FSEL = REG,
unless otherwise noted. Typical values are at T_A = +25°C.) (Note 1)
PARAMETER
SOFT-START/REFIN/REFOUT/FB
Soft-Start Current
REFOUT Output Voltage
REFIN Input Range
SYMBOL
I_SS
FB Accuracy
CONDITIONS
REFIN = REFOUT
FB = COMP, V_REFIN = 0.2V to 3.6V
FB Input Current
Open-Loop Gain
Unity-Gain Bandwidth
PWM Modulator Gain (V_IN /
V_RAMP)
CURRENT-LIMIT COMPARATOR
Cycle-by-Cycle Switch Current
Limit
Number of ILIM Events to Hiccup
I_ILIM
V_SS = 0.2V, V_FB = 0V
f_SYNC = 100kHz, V_IN = 7.5V
f_SYNC = 500kHz, V_IN = 40V
Hiccup Timeout
POWER SWITCH
Switch On-Resistance
BST Leakage Current
Switch Leakage Current
Switch Gate Charge
THERMAL SHUTDOWN
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
T_SHDN
V_BST - V_LX = 6V
V_BST = V_LX = V_IN = 40V
V_IN = 40V, V_LX = V_BST = 0V
V_BST - V_LX = 6V
MIN TYP MAX UNITS
8
0.97
0
0.97
V_REFIN
- 5mV
-250
15
0.98
0.98
V_REFIN
80
1.8
9.4
8.9
26
1.01
3.6
1.01
V_REFIN
+ 5mV
+250
µA
V
V
V
mV
nA
dB
MHz
V/V
2.5
3.5
4.5
A
4
—
512
Clock
periods
0.18 0.35
Ω
10
µA
10
µA
10
nC
+160
°C
20
°C
Note 1: Limits are 100% production tested at T_A = T_J = +25°C. Limits at -40°C and +125°C are guaranteed by design.
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